PSLEThere are some stickers in albums R and S. 80% of the stickers in album R and 25% of the stickers in album S are oval stickers. There is an equal number of square stickers in both albums. If there are 209 more oval stickers in album R than in album S, how many stickers are there in both albums altogether?
R |
S |
Oval |
Square |
Oval |
Square |
4x3 |
1x3 |
1 |
3 |
12 u |
3 u |
1 u |
3 u |
25% =
25100 =
1480% =
80100 =
45The number of square stickers in both albums is the same. Make the number of square stickers the same. LCM of 1 and 3 is 3.
Number of more oval stickers in Album R than Album S
= 12 u - 1 u
= 11 u
11 u = 209
1 u = 209 ÷ 11 = 19
Number of stickers in both albums
= 12 u + 3 u + 1 u + 3 u
= 19 u
= 19 x 19
= 361
Answer(s): 361